Choline precursorsSteroid precursorAn early molecule in the body’s steroid-biosynthesis pathway from which hormones are formed.
Alpha-GPC vs CDP-Choline
The table compares the compounds’ key data from their entry pages. Open each compound’s full entry for details. Educational content, not medical advice.
| AAlpha-GPC | CCDP-Choline | |
|---|---|---|
| What it is | Glycerophosphocholine, a bioavailable choline precursor. | Cytidine diphosphate-choline, dual choline + uridine precursor. |
| MechanismMechanism of actionThe molecular pathway by which a compound acts in the body (e.g. which receptor or enzyme it binds). | Choline precursor (ACh synthesis) | Choline + uridine precursor |
| Half-lifeHalf-lifeThe time for the compound’s plasma concentration to fall by half; indicates how fast it clears and how often it is dosed. | ~4-6 h | ~56 h (two phases) |
| Legal statusLegal / WADA statusThe compound’s regulatory status (e.g. prescription) and its place on the WADA prohibited-in-sport list. | EU Rx (IT) / OTC elsewhere | EU Rx / USA OTC |
| Full entry | Open → | Open → |
What it is
Alpha-GPCGlycerophosphocholine, a bioavailable choline precursor.
CDP-CholineCytidine diphosphate-choline, dual choline + uridine precursor.
MechanismMechanism of actionThe molecular pathway by which a compound acts in the body (e.g. which receptor or enzyme it binds).
Alpha-GPCCholine precursor (ACh synthesis)
CDP-CholineCholine + uridine precursor
Half-lifeHalf-lifeThe time for the compound’s plasma concentration to fall by half; indicates how fast it clears and how often it is dosed.
Alpha-GPC~4-6 h
CDP-Choline~56 h (two phases)
Legal statusLegal / WADA statusThe compound’s regulatory status (e.g. prescription) and its place on the WADA prohibited-in-sport list.
Alpha-GPCEU Rx (IT) / OTC elsewhere
CDP-CholineEU Rx / USA OTC
Full entry